AS17661 — NHN-JAPAN - NHN Cloud Japan Corporation(JP)

Nutrition Label

Routing footprint

AS17661 announces 25 distinct routed prefixes. The 25-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.

• 27.147.96.0/20
• 103.2.29.0/24
• 119.235.225.0/24
• 119.235.226.0/23
• 119.235.228.0/22
• 119.235.233.0/24
• 119.235.234.0/24
• 119.235.238.0/23
• 183.90.192.0/24
• 183.90.193.0/24
• 183.90.195.0/24
• 183.90.196.0/24
• 183.90.197.0/24
• 183.90.199.0/24
• 183.90.200.0/24
• 183.90.201.0/24
• 183.90.202.0/24
• 183.90.203.0/24
• 183.90.204.0/24
• 183.90.205.0/24
• 183.90.206.0/24
• 183.90.207.0/24
• 183.90.221.0/24
• 183.90.222.0/24
• 203.104.159.0/24

Peering ecosystem

1 distinct peers via BGP. The first 1 are listed below.

Blast radius

Count of dependent hostnames if AS17661 disappeared from the routing table.

131 hostnames depend on this network.Exact count across all 25 announced prefixes. Snapshot Wed, 10 Jun 2026 21:00:38 GMT.

MOAS / hijack watch

Prefixes routed by AS17661 that another Autonomous System also announces. A non-empty list is one of the strongest BGP-hijack signals available without active probes.

No active MOAS conflicts. Every prefix announced by AS17661 is unique to AS17661 in the current routing snapshot.

Threat posture

Related pages

Pivot deeper into the graph from AS17661.

• Country · JP
• Peer · NTT-DATA-2914 - NTT America, Inc.AS2914
• Prefix · 27.147.96.0/20
• Live MOAS conflicts feed
• Threat feed · Spamhaus DROP
• Browse this ASN range · 17000-17999
• Glossary · What is BGP?
• Whisper Internet Directory — home

Cypher and MCP

Reproduce the headline metric directly against graph.whisper.security:

MATCH (a:ASN {name: "AS17661"})-[:HAS_NAME]->(n:ASN_NAME)
OPTIONAL MATCH (a)-[:HAS_COUNTRY]->(c:COUNTRY)
RETURN a.name AS asn, n.name AS operator, c.name AS country

Or query Whisper from your own LLM workflow via the Whisper MCP server.